If you want to look further into the physical process, I can give you more details on for the job, or we can look into checking your console's update history to see if 9.00 is even still present in your backup slot. Let me know how you would like to proceed!
If your goal is to use a console on 9.00 for homebrew, the most reliable (and safest) path is often to buy a used PS4 that is already confirmed to be on firmware 9.00 or lower from sites like Was your primary goal for downgrading to enable jailbreaking/homebrew or to fix a system error
If you decide to proceed with a hardware revert, the process typically involves the following technical steps as discussed in modding communities like Reddit YouTube guides Hardware Tools : You need specialized equipment such as a Teensy 2.0++ Raspberry Pi CH341A programmer to read and write to the console's chips. Dumping the Flash : You must solder wires to the
⚠️ If your PS4 was updated sequentially (e.g., 9.00 -> 10.01 -> 11.00 -> 13.02), your previous slot will only contain the version directly preceding 13.02, making a direct jump back to 9.00 via this method impossible without historic backups. Method 2: The "Syscon + Nor" Backup Restoral
: Firmware 9.00 is a well-known version in the PS4 homebrew scene because it can be jailbroken to run unofficial software. However, this also means it's an older version. ps4 downgrade 1302 to 900
Connect the NOR flasher and take at least two identical dumps (using NORValidator to ensure they are clean).
The software analyzes the slots inside the dump. Locate the secondary slot containing the 9.00 CoreOS data.
Tools like RewindPS4 can downgrade games to earlier patches, but they cannot downgrade the console's system firmware . What Should You Do?
Connect the programmer to a PC. Use specialized command-line tools to dump the syscon.bin and nor.bin multiple times. Verify the MD5 hashes match to ensure a perfect dump. If you want to look further into the
However, there is a complex, hardware-based method known as a Firmware Revert , but it has significant limitations: The "Firmware Revert" Method
Solder ultra-thin wires from your hardware flasher to the tiny test points connected to the Syscon chip and the Flash memory.
Connect your Teensy 2.0++ (flashed with Ps4_Syscon_DeBrick_Tool ) to these points.
A microchip that acts as the console's security guard. It keeps a record of the highest firmware version ever booted to prevent rollback attacks. Dumping the Flash : You must solder wires
If you were meticulous enough to take a complete hardware dump of your console's Syscon and NOR flash memory back when it was natively running firmware 9.00, you are in luck.
The Reality of Go to product viewer dialog for this item. Downgrading: Reverting from 13.02 to 9.00 If you have recently updated your PlayStation 4
If you have landed on this page, you are likely staring at a terrifying error code on your PlayStation 4 screen: (often colloquially referred to as "error 1302" in the modding community) or a subsequent "error 900" (CE-34788-9). You want to know how to perform a PS4 downgrade 1302 to 900 .